Tunnel blasting displacement monitoring auxiliary device and displacement monitoring method

Abstract

The invention discloses a tunnel blasting displacement monitoring auxiliary device and a displacement monitoring method. The tunnel blasting displacement monitoring auxiliary device comprises a supporting frame, a balance weight platform and a displacement sensor fixing device. The supporting frame comprises two supporting sets which are oppositely arranged, each supporting set comprises two telescopic supporting rods, each telescopic supporting rod comprises an upper rod and a supporting rod which are connected in a telescopic mode, the tops of the two telescopic supporting rods are rotationally connected, and the tops of the two supporting sets are connected through a limiting connecting rod. A plurality of cross rod connecting holes are formed in the upper rods on the opposite surfaces of the two supporting groups, the counterweight platform is connected to the lower part between the two supporting groups, and the displacement sensor fixing device is detachably connected to the upper part between the two supporting groups. According to the device, the telescopic cross rod is fixed in the cross rod connecting holes with different heights, and horizontal displacement monitoring work can be carried out within a large height range in cooperation with the linear displacement sensor. In this way, the function of monitoring horizontal displacement at different heights based on the linear displacement sensor is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of displacement monitoring of rock and soil blasting engineering, and in particular to a tunnel blasting displacement monitoring auxiliary device and a displacement monitoring method. Background Art

[0002] Since blasting operations may cause vibration, air shock waves, flying debris and other potential hazards due to their scale, methods and environment, posing a threat to surrounding buildings, infrastructure and personnel safety, it is particularly important to use displacement sensors for accurate and real-time displacement monitoring. Sensors are usually installed in key locations, such as buildings, underground structures or key points of rock mass around the blasting area, to continuously capture small displacement changes caused by blasting operations. It provides intuitive and accurate data support for engineers.

[0003] At present, the use of linear displacement sensors is usually installed in the form of bracket fixing. When installing, the sensor needs to be fixed on the bracket first, and then the follower shaft is in contact with the moving object to be measured. However, the installation bracket has problems such as difficulty in assembly and disassembly, inability to ensure that the displacement sensor remains horizontal, non-adjustable height, and inconvenient storage when idle.

[0004] Therefore, it is urgent to develop a tunnel blasting displacement monitoring auxiliary device and a displacement monitoring method in blasting data monitoring in geotechnical fields such as mines and tunnels. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a tunnel blasting displacement monitoring auxiliary device and a displacement monitoring method.

[0006] The technical solution of the present invention is as follows:

[0007] A tunnel blasting displacement monitoring auxiliary device, comprising a support frame, a counterweight platform and a displacement sensor fixing device;

[0008] The support frame includes two support groups arranged opposite to each other, each support group includes two telescopic support rods, each telescopic support rod includes an upper rod and a support rod connected telescopically, the tops of the two telescopic support rods are rotatably connected, the tops of the two support groups are connected by a limit connecting rod, and a plurality of crossbar connecting holes are arranged on the upper rods on the opposite sides of the two support groups;

[0009] The counterweight platform is connected to the lower part between the two support groups. The counterweight platform includes two foldably connected counterweight platforms. The connection axis at the middle position is perpendicular to the support group. At least one counterweight platform is provided with a plurality of telescopic crossbar storage holes, the opening of which is facing away from the connection axis. A baffle is provided at the opening. The telescopic crossbar storage holes are used to place the telescopic crossbars.

[0010] The displacement sensor fixing device comprises a horizontal plate and two slidable catches, wherein the upper part of the slidable catches is sleeved on the horizontal plate, and the lower part is sleeved on the telescopic cross bar. The displacement sensor fixing device and the two telescopic cross bars sleeved on the lower part are detachably connected to the upper part between the two support groups.

[0011] The upper rod is a hollow tube, and a plurality of crossbar connection holes are arranged at equal intervals on the inner side. The support rod is inserted into the upper rod and fixed to the upper rod by a combination of threaded fasteners;

[0012] A limited connection hole is arranged on the top of the upper rod for the limited connection rod to penetrate.

[0013] After removing the counterweight platform of the device, the two telescopic support rods of each support group can be adjusted to 180 degrees, all the telescopic cross bars in the telescopic cross bar storage holes of the counterweight platform can be taken out, and placed at intervals of one or more cross bar connection holes to realize the ladder function.

[0014] Preferably, the crossbar connection holes can be set to have a diameter of 3 cm and an interval of 5 cm, which can increase the accuracy of height control to a certain extent.

[0015] The bottom of the support rod is provided with a support foot, the top is provided with an anti-drop cap, and a sliding groove is provided on the support rod body;

[0016] The threaded fastener assembly includes a nut and a lug screw;

[0017] The sliding groove includes a nut groove, the width of the nut groove matches the nut size and is larger than the width of the front and rear grooves. The nut is arranged in the nut groove. A limiting hole is provided on the outer side of the lower part of the upper rod. The screw part of the ear screw passes through the limiting hole and is inserted into the sliding groove and passes through the nut.

[0018] In order to maximize the adjustable length of the support rod, the limit hole is set at the bottom end of the upper rod.

[0019] During installation, first place the nut in the sliding groove inside the support rod, and then buckle the anti-drop cap to limit the position and prevent the nut from falling out.

[0020] When installing the displacement sensor, the telescopic crossbar will be inserted into the upper rod. To avoid interference between the support rod and the telescopic crossbar, a sliding groove is designed to penetrate the support rod body. The cross section is in the shape of a "Z" character. From the outside to the inside, it is divided into a screw hole, a nut slot, a screw hole, and a crossbar slot. The size of the screw hole matches the size of the screw with an ear screw, and the size of the crossbar slot matches the size of the telescopic crossbar and is larger than the size of the screw hole. In this way, after the telescopic crossbar is inserted into the upper rod, it will enter the crossbar slot to avoid interference. The middle part of the "Z"-shaped slot has the largest size, which can clamp the nut to prevent the nut from being misplaced.

[0021] A lower connecting hole is provided at the bottom of the counterweight platform away from the connecting axis, in which a connecting cross bar is passed, and reverse threads are provided at both ends of the connecting cross bar. A positioning hole is provided at the lower part of the upper rod, and the positioning hole is provided with an internal thread, which is threadedly connected to the connecting cross bar.

[0022] Preferably, the counterweight platform should be as low as possible to improve the stability of the lower plate of the device. Therefore, the positioning hole is arranged as low as possible on the upper rod, preferably close to the position above the limit hole.

[0023] A staggered connecting piece is provided at the joint of the two counterweight platforms, an upper connecting hole is opened on the connecting piece, and the two counterweight platforms are connected by a counterweight platform connecting rod. The counterweight platform connecting rod includes a connecting rod and a first fixing screw. The connecting rod is inserted into the upper connecting hole and is perpendicular to the support group. The first fixing screw is sealed at both ends of the connecting rod.

[0024] A catch is provided on the outer side of the upper rod for fixing the displacement sensor fixing device. The catch is made of composite material and must have certain strength and plasticity.

[0025] The telescopic cross bar specifically includes: a cross bar, a spring, a variable-diameter nut and a cross bar head. Placement holes are provided at both ends of the cross bar. After the spring and the cross bar head are placed in the placement holes in turn, the variable-diameter nut is used to fix them.

[0026] The horizontal plate is equipped with matching holes for installing displacement sensors and leveling bubbles. A tape measure can also be added to achieve free control of the height.

[0027] The slidable catch on the horizontal plate includes an upper C-shaped catch and a lower fastener. The C-shaped catch clamps the horizontal plate, and a control screw is arranged at the opening. The fastener includes two upper and lower arc-shaped clamps, which are fastened by a second fixing screw after clamping the telescopic horizontal rod.

[0028] The present invention also provides a tunnel blasting displacement monitoring method, which is implemented by using the above tunnel blasting displacement monitoring auxiliary device, and the specific method is:

[0029] The first step is to assemble the bracket body;

[0030] A1, assemble the telescopic support rod;

[0031] First, put the nut into the sliding groove of the support rod, and buckle the anti-drop cap on the upper part of the support rod to prevent the nut from falling out;

[0032] Push the support rod into the upper rod, and connect the support rod and the upper rod by passing the ear screw through the limiting hole of the upper rod and cooperating with the nut to form the telescopic support rod of the device;

[0033] A2, connected to the counterweight platform;

[0034] Use the connecting cross bar to pass through the lower connecting hole of the counterweight platform, and connect the threads at both ends of the connecting cross bar to the positioning holes of the upper rods corresponding to the two support groups respectively;

[0035] Connect the adjacent ends of the two counterweight platforms through a counterweight platform connecting rod;

[0036] A3, connecting two support groups;

[0037] Insert the limit connecting rods on the tops of the two support groups, and use the blocking screws at both ends to fix the position of the limit connecting rods, so that the two support groups form a support frame;

[0038] A4, organize the telescopic crossbar;

[0039] Place the spring and the crossbar head in the placement hole of the crossbar body in sequence, and fix them with variable-caliber nuts to form a telescopic crossbar;

[0040] Then, place the telescopic cross bar in the telescopic cross bar storage hole of the counterweight platform and fix it with the baffle;

[0041] A5, install the displacement sensor fixture;

[0042] Use the second fixing screw to connect the two parts of the fastener together, and use the control screw to fix the slidable catch on the horizontal plate to form a displacement sensor fixing device. Finally, press the horizontal plate into the catch at the side end of the upper rod to complete the assembly of the bracket body;

[0043] The second step is to adjust the installation height and angle;

[0044] Open the telescopic support rod, level the counterweight platform, and then loosen the threaded fastener combination. According to the required monitoring height, use the leveling bubble on the horizontal plate to adjust the extension length of the support rod to perform leveling operations, and then fix it with the threaded fastener combination;

[0045] Take out two telescopic cross bars from the telescopic cross bar storage holes on the counterweight platform; place the telescopic cross bars in the appropriate cross bar connection holes of the upper rod; displacement monitoring at different heights can be achieved by adjusting the selected positioning holes;

[0046] The third step is to connect the displacement sensor;

[0047] Remove the displacement sensor fixture from the catch on the side of the upper rod;

[0048] Loosen the second fixing screw to separate the two parts of the fastener;

[0049] Then loosen the control screw;

[0050] Move the slidable catch to a suitable position of the horizontal plate, embed the telescopic cross bar into the fastener, and tighten the other part of the fastener by the second fixing screw to achieve the connection between the displacement sensor fixing device and the bracket body;

[0051] Tighten the control screw;

[0052] Fix the displacement sensor to the matching hole on the horizontal plate;

[0053] Step 4: Use of the device;

[0054] When performing displacement monitoring, after the third step is completed, the excess telescopic crossbars are placed in the telescopic crossbar storage holes of the counterweight platform to provide a certain counterweight for the device, and / or, sandbags or gravel on site are placed on the counterweight platform to increase the counterweight and improve the stability of the device, and then the displacement sensor data is monitored.

[0055] When used as a ladder, after the first step is completed, remove the counterweight platform, adjust the telescopic support rod to 180 degrees, take out all the telescopic crossbars in the counterweight platform, and place them at intervals of one or more crossbar connection holes to achieve the ladder function;

[0056] Step 5, recovery device;

[0057] After use, remove the displacement sensor;

[0058] Loosen the second fixing screw, open the fastener and remove the displacement sensor fixing device, then tighten the second fixing screw to prevent the other part of the fastener from falling off;

[0059] Press the crossbar into the catches on the sides of the upper bar;

[0060] Remove the telescopic crossbar from the crossbar connection hole of the upper rod, and put it into the telescopic crossbar storage hole of the load-bearing platform, and fix it with a baffle;

[0061] Finally, loosen the ear screws, retract the support rods, and complete the recovery of the device.

[0062] The beneficial effects of the present invention are:

[0063] 1. This device is fixed in the connecting holes of the crossbars at different heights through the telescopic crossbars, and can monitor the horizontal displacement in a wide range of heights with the linear displacement sensor. In this way, the horizontal displacement monitoring function at different heights based on the linear displacement sensor is realized.

[0064] 2. The telescopic support rod of the device can be horizontally leveled according to the leveling bubbles provided on the horizontal plate of the displacement sensor fixing device through the combination of the support rod, the upper rod and the threaded fastener, which can effectively ensure the accuracy of the data. At the same time, the design of the counterweight platform can use the redundant telescopic crossbars and on-site sandbags or gravel to add counterweight to the support frame, which has strong flexibility and also improves the stability of the device.

[0065] 3. The device is foldable, making it easy to store when not in use, greatly saving space. At the same time, the counterweight platform can be disassembled and telescopic crossbars can be arranged according to needs, making the device have the same function as a ladder. This multifunctional design makes the device not only limited to horizontal displacement monitoring, but also can play its role in a variety of occasions, thereby significantly improving the utilization rate and application range of the device.

[0066] In summary, this device can monitor horizontal displacement more efficiently and accurately through clever design and multi-functional integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In the attached picture:

[0068] Figure 1 It is an overall schematic diagram of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0069] Figure 2 The diagram is a schematic diagram of the contraction of a tunnel blasting displacement monitoring auxiliary device according to the present invention.

[0070] Figure 3 This is a schematic diagram of a telescopic support rod of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0071] Figure 4 This is a detailed diagram of a support rod of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0072] Figure 5 This is an enlarged view of the support rod head of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0073] Figure 6 The present invention is a cross-sectional view of a telescopic cross bar of a tunnel blasting displacement monitoring auxiliary device.

[0074] Figure 7 The present invention is a schematic diagram of a counterweight platform of a tunnel blasting displacement monitoring auxiliary device.

[0075] Figure 8 This is a schematic diagram of a counterweight platform of a tunnel blasting displacement monitoring auxiliary device of the present invention with the baffle removed.

[0076] Fig. 9This is a schematic diagram of another implementation of a counterweight platform of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0077] Fig.10 It is a schematic diagram of a displacement sensor fixing device of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0078] Fig.11 The figure is a schematic diagram of the ladder shape of a tunnel blasting displacement monitoring auxiliary device of the present invention.

[0079] Fig.12 This is a flow chart of a tunnel blasting displacement monitoring method of the present invention;

[0080] The components represented by the reference numerals in the figure are:

[0081] 1. Telescopic support rod; 11. Upper rod; 111. Crossbar connecting hole; 112. Positioning hole; 113. Limiting hole; 114. Grab buckle; 115. Limiting connecting hole; 12. Support rod; 121. Support foot; 122. Anti-drop cap; 123. Sliding groove; 13. Threaded fastener assembly; 131. Nut; 132. Ear screw; 14. Limiting connecting rod; 15. Blocking screw; 2. Counterweight platform; 21. Counterweight platform; 211. Telescopic crossbar storage hole; 212. Upper connecting hole; 213. Lower connecting hole ; 214, baffle sliding groove; 215, baffle; 22, telescopic cross bar; 221, cross bar body; 2211, placement hole; 222, spring; 223, variable diameter nut; 224, cross bar head; 23, connecting cross bar; 24, counterweight platform connecting rod; 241, connecting rod; 242, first fixing screw; 3, displacement sensor fixing device; 31, cross plate; 311, matching hole; 312, leveling bubble; 32, slidable catch; 321, fastener; 322, second fixing screw; 323, control screw. DETAILED DESCRIPTION

[0082] See also Figure 1 , a tunnel blasting displacement monitoring auxiliary device, including a support frame, a counterweight platform 2 and a displacement sensor fixing device 3.

[0083] See also Figure 3 The support frame includes two support groups arranged opposite to each other on the left and right, each support group includes two telescopic support rods 1, each telescopic support rod 1 includes an upper rod 11 and a support rod 12 which are telescopically connected, the support rod 12 is inserted into the upper rod 11, the two telescopic support rods 1 are rotatably connected at the top, the two support groups are connected at the top by a limiting connecting rod 14, and a plurality of cross bar connecting holes 111 are provided on the upper rods 11 on the opposite sides of the two support groups.

[0084] In this embodiment, the upper rod 11 is a hollow rectangular tube, and a plurality of cross rod connecting holes 111 are arranged at equal intervals on the inner side. The support rod 12 is inserted into the upper rod 11 and fixed to the upper rod 11 by a threaded fastener assembly 13.

[0085] See also Figure 3 and Figure 4 As shown, a limit connection hole 115 is provided at the top of the upper rod 11 for the limit connection rod 14 to penetrate. Then, the position of the limit connection rod 14 is fixed by using blocking screws 15 at both ends.

[0086] A support foot 121 is provided at the bottom of the support rod 12, and the bottom of the support foot 121 is pointed, which is convenient for inserting into the ground. An anti-drop cap 122 is provided at the top of the support rod 12, and a sliding groove 123 is provided along the length direction of the rod body of the support rod 12.

[0087] The threaded fastener assembly 13 includes a nut 131 and an ear screw 132 .

[0088] The sliding groove 123 includes a nut groove, the width of which matches the size of the nut 131 and is larger than the width of the front and rear grooves. The nut 131 is arranged in the nut groove, and a limiting hole 113 is provided on the outer side of the lower part of the upper rod 11. The screw part of the ear screw 132 passes through the limiting hole 113 and is inserted into the sliding groove 123, and passes through the nut 131. When the ear screw 132 is rotated, the ear of the ear screw 132 is stuck outside the upper rod 11 and can only rotate in place, and the nut 131 will drive the support rod 12 to move toward the ear, and finally drive the support rod 12 and the upper rod 11 to be squeezed together and fixed.

[0089] In order to maximize the adjustable length of the support rod 12 , the limiting hole 113 is arranged at the bottom end of the upper rod 11 .

[0090] During installation, the nut 131 is first placed in the sliding groove 123 inside the support rod 12 , and then the anti-drop cap 122 is buckled to limit the position and prevent the nut 131 from falling out.

[0091] The counterweight platform 2 is connected to the lower part between the two support groups. The counterweight platform 2 includes two foldable counterweight platforms 21, and the connecting axis in the middle is perpendicular to the support group. The unfolded length of the counterweight platform 2 determines the unfolding angle of the support frame, which is determined according to the design length of the telescopic support rod 1, and the counterweight platform 2 is as low as possible to stabilize the lower plate.

[0092] See also Figure 7 A lower connecting hole 213 is provided at the bottom of the counterweight platform 21 away from the connecting axis, in which a connecting cross bar 23 is passed, and reverse threads are provided at both ends of the connecting cross bar 23. A positioning hole 112 is provided at the lower part of the upper rod 11, and the positioning hole 112 is provided with an internal thread and is threadedly connected to the connecting cross bar 23.

[0093] Preferably, the counterweight platform 21 should be as low as possible to improve the stability of the lower plate of the device. Therefore, the positioning hole 112 is arranged as low as possible on the upper rod 11, preferably close to the position above the limiting hole 113.

[0094] In order to facilitate the insertion of the connecting cross bar 23, a long sleeve can be provided at the bottom of the counterweight platform 21 away from the connecting axis. The inner hole of the sleeve is the lower connecting hole 213, and the two are conveniently connected.

[0095] See also Fig. 9 As a further preferred solution, short sleeves are set at both ends of the bottom of the counterweight platform 21 away from the connecting axis, leaving the middle position empty, and the connecting cross bar 23 is milled into a square table or a hexagonal table in the middle position, so that the connecting cross bar 23 can be rotated using a clamping tool so that its two ends can be conveniently threadedly connected to the upper rod 11.

[0096] The two counterweight platforms 21 are connected at the joint with staggered connecting pieces, on which upper connecting holes 212 are opened, and the two counterweight platforms 21 are connected by a counterweight platform connecting rod 24, which includes a connecting rod 241 and a first fixing screw 242. The connecting rod 241 is inserted into the upper connecting hole 212, perpendicular to the support group, and the first fixing screw 242 is sealed at both ends of the connecting rod 241.

[0097] Similarly, in order to facilitate the insertion of the connecting rod 241, short sleeves arranged in a staggered manner are provided at the bottom of the adjacent ends of the two counterweight platforms 21, which is convenient for manufacturing.

[0098] As a preferred solution, the thickness of the counterweight platform 21 should not be greater than the width of the upper rod 11, and the folding direction is upward, so that after the support frame is folded, the counterweight platform 21 is folded upward to the middle position and does not exceed the front and rear surfaces of the support frame, which is convenient for transportation. Figure 2 shown.

[0099] In addition, after the counterweight platform 2 of the device is removed, the two telescopic support rods 1 of each support group can be adjusted to 180 degrees and used as a ladder. The premise is that the telescopic cross rods 22 need to be connected to the cross rod connection holes 111. Fig.11 shown.

[0100] In order to facilitate integrated transportation, according to the required number of telescopic cross bars 22, at least one counterweight platform 21 is provided with a plurality of telescopic cross bar storage holes 211, the openings of which are facing away from the connection axis, and baffles 215 are provided at the openings. The telescopic cross bars 22 are placed in the telescopic cross bar storage holes 211. Figure 7 and Figure 8 The telescopic crossbar storage hole 211 is perpendicular to the folding direction of the counterweight platform 21 and is larger than the telescopic crossbar 22 for easy removal. A baffle sliding groove 214 is provided on the bottom side of the counterweight platform 21, and a baffle 215 is inserted into the baffle sliding groove 214 to achieve a limiting effect.

[0101] If a single counterweight platform 21 cannot be released, both counterweight platforms 21 are provided with a telescopic crossbar storage hole 211 .

[0102] When the ladder is used, all the telescopic cross bars 22 in the telescopic cross bar storage holes 211 of the counterweight platform 21 are taken out and placed at intervals of one or more cross bar connecting holes 111 to realize the ladder function.

[0103] Preferably, the crossbar connection holes 111 can be set to have a diameter of 3 cm and a spacing of 5 cm, which can increase the accuracy of height control to a certain extent.

[0104] See also Fig.10 The displacement sensor fixing device 3 includes a horizontal plate 31 and two slidable catches 32. The upper part of the slidable catches 32 is sleeved on the horizontal plate 31, and the lower part is sleeved on the telescopic cross bar 22. The displacement sensor fixing device 3 together with the two telescopic cross bars 22 sleeved at the lower part are detachably connected to the upper part between the two support groups.

[0105] In order to facilitate the integration and fixing of the displacement sensor fixing device 3 in the folded state of the device, a catch 114 is provided on the outer side of the upper rod 11 for fixing the displacement sensor fixing device 3. The catch 114 is made of a composite material and must have a certain strength and plasticity.

[0106] See also Figure 6 The design of the telescopic crossbar 22 specifically includes: a crossbar, a spring 222, a variable diameter nut 223 and a crossbar head 224. The two ends of the crossbar are provided with placement holes 2211. After the spring 222 and the crossbar head 224 are sequentially placed in the placement holes 2211, they are fixed with the variable diameter nut 223. The size of the crossbar head 224 is the same as the size of the crossbar connection hole (111).

[0107] The horizontal plate 31 is provided with a matching hole 311 for installing a displacement sensor and a leveling bubble 312. A tape measure can be further provided to achieve free control of the height.

[0108] See also Fig.10 The slidable catch 32 on the horizontal plate 31 includes an upper C-shaped catch and a lower fastener 321. The C-shaped catch clamps the horizontal plate 31, and a control screw 323 is set at the opening. The fastener 321 includes two upper and lower arc-shaped clamps, which are fastened by a second fixing screw 322 after clamping the telescopic cross bar 22.

[0109] As one of the preferred embodiments, see Figure 5When installing the displacement sensor, the telescopic crossbar 22 will be inserted into the upper rod 11. In order to avoid interference between the support rod 12 and the telescopic crossbar 22, a sliding groove 123 is designed to penetrate the rod body of the support rod 12. The cross section is in the shape of a "Z" character. From the outside to the inside, it is divided into a screw hole, a nut groove, a screw hole, and a crossbar groove. The size of the screw hole matches the screw size of the ear screw 132, and the size of the crossbar groove matches the size of the telescopic crossbar 22 and is larger than the size of the screw hole. In this way, after the telescopic crossbar 22 is inserted into the upper rod 11, it will enter the crossbar groove to avoid interference. The middle part of the "Z" character notch has the largest size, which can clamp the nut 131 to prevent the nut 131 from being misplaced.

[0110] The present invention also provides a tunnel blasting displacement monitoring method, which is implemented by using the above tunnel blasting displacement monitoring auxiliary device, see Fig.12 , the specific method is:

[0111] The first step is to assemble the bracket body;

[0112] A1, assemble the telescopic support rod 1;

[0113] First, put the nut 131 into the sliding groove 123 of the support rod 12, and buckle the anti-drop cap 122 on the upper part of the support rod 12 to prevent the nut 131 from falling out;

[0114] Push the support rod 12 into the upper rod 11, and connect the support rod 12 and the upper rod 11 by the ear screw 132 passing through the limiting hole 113 of the upper rod 11 and cooperating with the nut 131 to form the telescopic support rod 1 of the device;

[0115] A2, connected to counterweight platform 2;

[0116] Use the connecting cross bar 23 to pass through the lower connecting hole 213 of the counterweight platform 21, and thread the two ends of the connecting cross bar 23 to the positioning holes 112 of the upper rods 11 corresponding to the two support groups respectively;

[0117] Connect the adjacent ends of the two counterweight platforms 21 through a counterweight platform connecting rod 24;

[0118] A3, connecting two support groups;

[0119] Insert the limit connecting rod 14 at the top of the two support groups, and use the blocking screws 15 at both ends to fix the position of the limit connecting rod 14, so that the two support groups form a support frame;

[0120] A4, arranging telescopic crossbar 22;

[0121] The spring 222 and the crossbar head 224 are sequentially placed in the placement hole 2211 of the crossbar body 221 and fixed with a variable-diameter nut 223 to form a telescopic crossbar 22;

[0122] Then, the telescopic cross bar 22 is placed in the telescopic cross bar storage hole 211 of the counterweight platform 21 and fixed by the baffle 215;

[0123] A5, installing the displacement sensor fixing device 3;

[0124] Use the second fixing screw 322 to connect the two parts of the fastener 321 together, and use the control screw 323 to fix the slidable catch 32 on the horizontal plate 31 to form the displacement sensor fixing device 3. Finally, press the horizontal plate 31 into the catch 114 at the side end of the upper rod 11 to complete the assembly of the bracket body.

[0125] The second step is to adjust the installation height and angle;

[0126] Open the telescopic support rod 1, level the counterweight platform 2, and then loosen the threaded fastener assembly 13. According to the required monitoring height, use the leveling bubble 312 on the horizontal plate 31 to adjust the extension length of the support rod 12 to perform leveling operations, and then fix it with the threaded fastener assembly 13;

[0127] Take out two telescopic cross bars 22 from the telescopic cross bar storage holes 211 on the counterweight platform 21; place the telescopic cross bars 22 in the appropriate cross bar connection holes 111 of the upper rod 11; displacement monitoring at different heights can be achieved by adjusting the selected positioning holes 112;

[0128] The third step is to connect the displacement sensor;

[0129] Remove the displacement sensor fixture 3 from the catch 114 on the side of the upper rod 11;

[0130] Loosen the second fixing screw 322 to separate the two parts of the fastener 321;

[0131] Then loosen the control screw 323;

[0132] Move the slidable catch 32 to a suitable position of the horizontal plate 31, embed the telescopic cross bar 22 into the fastener 321, and tighten the other part of the fastener 321 through the second fixing screw 322 to achieve the connection between the displacement sensor fixing device 3 and the bracket body;

[0133] Tighten the control screw 323;

[0134] Fix the displacement sensor to the matching hole 311 on the horizontal plate 31;

[0135] Step 4: Use of the device;

[0136] When performing displacement monitoring, after the third step is completed, the excess telescopic cross bar 22 is placed in the telescopic cross bar storage hole 211 of the counterweight platform 21 to provide a certain counterweight for the device, and / or, sandbags or gravel on site are placed on the counterweight platform 2 to increase the counterweight and improve the stability of the device, and then the displacement sensor data is monitored.

[0137] When used as a ladder, after the first step is completed, remove the counterweight platform 2, adjust the telescopic support rod 1 to 180 degrees, take out all the telescopic cross bars 22 in the counterweight platform 21, and place them at intervals of one or more cross bar connection holes 111, so that the ladder function can be realized;

[0138] Step 5, recovery device;

[0139] After use, remove the displacement sensor;

[0140] Loosen the second fixing screw 322, open the fastener 321, remove the displacement sensor fixing device 3, and then tighten the second fixing screw 322 to prevent the other part of the fastener 321 from falling off;

[0141] Press the horizontal plate 31 into the catch 114 on the side of the upper rod 11;

[0142] Remove the telescopic cross bar 22 from the cross bar connection hole 111 of the upper rod 11, and put it into the telescopic cross bar storage hole 211 of the load-bearing platform, and fix it with the baffle 215;

[0143] Finally, the ear screw 132 is loosened, the support rod 12 is retracted, and the recovery of the device is completed.

Claims

1. A tunnel blasting displacement monitoring auxiliary device, characterized in that: It comprises a support frame, a counterweight platform (2) and a displacement sensor fixing device (3); The support frame comprises two support groups arranged opposite to each other, each support group comprises two telescopic support rods (1), each telescopic support rod (1) comprises an upper rod (11) and a support rod (12) which are telescopically connected, the tops of the two telescopic support rods (1) are rotatably connected, the tops of the two support groups are connected by a limit connecting rod (14), and a plurality of crossbar connecting holes (111) are provided on the upper rods (11) on opposite sides of the two support groups; The counterweight platform (2) is connected to the lower part between the two support groups, and the counterweight platform includes two foldably connected counterweight platforms (21), the connection axis at the middle position is perpendicular to the support group, and at least one counterweight platform (21) is provided with a plurality of telescopic crossbar storage holes (211), the opening is facing the side away from the connection axis, and a baffle (215) is provided at the opening, and the telescopic crossbar storage holes (211) are used to place the telescopic crossbar (22); The displacement sensor fixing device (3) comprises a horizontal plate (31) and two slidable catches (32); the upper portion of the slidable catches (32) is sleeved on the horizontal plate (31), and the lower portion is sleeved on the telescopic cross bar (22); the displacement sensor fixing device (3) together with the two telescopic cross bars (22) sleeved on the lower portion are detachably connected to the upper portion between the two support groups.

2. A tunnel blasting displacement monitoring auxiliary device according to claim 1, characterized in that: The upper rod (11) is a hollow tube, and a plurality of cross rod connection holes (111) are arranged at equal intervals on the inner side. The support rod (12) is inserted into the upper rod (11) and fixed to the upper rod (11) by a threaded fastener assembly (13); A limiting connection hole (115) is provided at the top of the upper rod (11) for the limiting connection rod (14) to penetrate therein.

3. A tunnel blasting displacement monitoring auxiliary device according to claim 2, characterized in that: The support rod (12) is provided with a support foot (121) at the bottom, an anti-drop cap (122) at the top, and a sliding groove (123) is provided on the rod body of the support rod (12); The threaded fastener assembly (13) comprises a nut (131) and an ear screw (132); The sliding groove (123) includes a nut groove, the width of which matches the size of the nut and is greater than the width of the front and rear grooves. The nut (131) is arranged in the nut groove. A limiting hole (113) is provided on the outer side of the lower part of the upper rod (11). The screw part of the ear screw (132) passes through the limiting hole (113) and is inserted into the sliding groove (123) and passes through the nut (131).

4. The tunnel blasting displacement monitoring auxiliary device according to claim 3 is characterized in that: The sliding groove (123) penetrates the rod body of the support rod (12) and is divided into a screw hole, a nut groove, a screw hole, and a cross bar groove from the outside to the inside. The size of the screw hole matches the screw size of the ear screw (132), and the size of the cross bar groove matches the size of the telescopic cross bar (22) and is larger than the size of the screw hole.

5. The tunnel blasting displacement monitoring auxiliary device according to claim 1 is characterized in that: The bottom of the counterweight platform (21) away from the connecting axis is provided with a lower connecting hole (213), in which a connecting cross bar (23) is inserted, and both ends of the connecting cross bar (23) are provided with reverse threads. The lower part of the upper rod (11) is provided with a positioning hole (112), and the positioning hole (112) is provided with an internal thread and is threadedly connected to the connecting cross bar (23).

6. The tunnel blasting displacement monitoring auxiliary device according to claim 1, characterized in that: A staggered connecting piece is provided at the joint of the two counterweight platforms, an upper connecting hole (212) is provided on the connecting piece, and the two counterweight platforms are connected via a counterweight platform connecting rod (24), the counterweight platform connecting rod (24) comprising a connecting rod (241) and a first fixing screw (242), the connecting rod (241) is inserted into the upper connecting hole (212) and is perpendicular to the support group, and the first fixing screw (242) is sealed at both ends of the connecting rod (241).

7. The tunnel blasting displacement monitoring auxiliary device according to claim 1, characterized in that: A catch (114) is provided on the outer side of the upper rod (11) for fixing the displacement sensor fixing device (3).

8. The tunnel blasting displacement monitoring auxiliary device according to claim 1, characterized in that: The telescopic cross bar (22) comprises: a cross bar (221), a spring (222), a variable-caliber nut (223) and a cross bar head (224); placement holes (2211) are provided at both ends of the cross bar (221); after the spring (222) and the cross bar head (224) are sequentially placed in the placement holes (2211), the variable-caliber nut (223) is used to fix them.

9. The tunnel blasting displacement monitoring auxiliary device according to claim 1, characterized in that: The horizontal plate (31) is provided with a matching hole (311) for installing a displacement sensor and a leveling bubble (312); The slidable catch (32) comprises an upper C-shaped catch and a lower fastener (321), wherein the C-shaped catch clamps the horizontal plate (31), and a control screw (323) is arranged at the opening, and the fastener (321) comprises two upper and lower arc-shaped clips, which are fastened by a second fixing screw (322) after clamping the telescopic horizontal rod (22).

10. A tunnel blasting displacement monitoring method, implemented by using a tunnel blasting displacement monitoring auxiliary device according to any one of claims 1 to 9, characterized in that: The specific method is: The first step is to assemble the bracket body; A1, assemble the telescopic support rod (1); First, the nut (131) is placed in the sliding groove (123) of the support rod (12), and the anti-drop cap (122) is buckled on the upper part of the support rod (12) to prevent the nut (131) from falling out; The support rod (12) is pushed into the upper rod (11), and the ear screw (132) passes through the limiting hole (113) of the upper rod (11) and cooperates with the nut (131) to connect the support rod (12) and the upper rod (11), thereby forming the telescopic support rod (1) of the device; A2, connected to the counterweight platform (2); Use a connecting cross bar (23) to pass through the lower connecting hole (213) of the counterweight platform (21), and thread the two ends of the connecting cross bar (23) to be threadedly connected to the positioning holes (112) of the upper rods (11) corresponding to the two support groups; Connecting adjacent ends of two counterweight platforms (21) via a counterweight platform connecting rod (24); A3, connecting two support groups; A limit connecting rod (14) is inserted into the top of the two support groups, and the positions of the limit connecting rod (14) are fixed with blocking screws (15) at both ends, so that the two support groups form a support frame; A4, arrange the telescopic crossbar (22); The spring (222) and the crossbar head (224) are sequentially placed in the placement hole (2211) of the crossbar body (221), and fixed with a variable-diameter nut (223) to form a telescopic crossbar (22); Then, the telescopic cross bar (22) is placed in the telescopic cross bar storage hole (211) of the counterweight platform (21) and fixed by the baffle (215); A5, installing the displacement sensor fixture (3); The two parts of the fastener (321) are connected together by a second fixing screw (322), and the slidable catch (32) is fixed to the horizontal plate (31) by a control screw (323) to form a displacement sensor fixing device (3), and finally the horizontal plate (31) is pressed into the catch (114) at the side end of the upper rod (11) to complete the assembly of the bracket body; The second step is to adjust the installation height and angle; The telescopic support rod (1) is opened, the counterweight platform (2) is leveled, and then the threaded fastener assembly (13) is loosened. According to the required monitoring height, the extension length of the support rod (12) is adjusted with the help of the leveling bubble (312) on the horizontal plate (31) to perform the leveling operation, and then fixed with the threaded fastener assembly (13); Take out two telescopic cross bars (22) from the telescopic cross bar storage holes (211) on the counterweight platform (21); place the telescopic cross bars (22) in appropriate cross bar connection holes (111) of the upper rod (11); and achieve displacement monitoring at different heights by adjusting the selected positioning holes (112); The third step is to connect the displacement sensor; Remove the displacement sensor fixture (3) from the catch (114) on the side of the upper rod (11); Loosen the second fixing screw (322) to separate the two parts of the fastener (321); Then loosen the control screw (323); The slidable catch (32) is moved to a suitable position of the horizontal plate (31), and the telescopic cross bar (22) is embedded in the fastener (321). At this time, the other part of the fastener (321) is tightened by the second fixing screw (322); thus, the displacement sensor fixing device (3) is connected to the bracket body; Tighten the control screw (323); Fixing the displacement sensor on the matching hole (311) on the horizontal plate (31); Step 4: Use of the device; When displacement monitoring is performed, after the third step is completed, the redundant telescopic crossbar (22) is placed in the telescopic crossbar storage hole (211) of the counterweight platform (21) to provide a certain counterweight for the device, and / or, sandbags or gravel on site are placed on the counterweight platform (2) to increase the counterweight and improve the stability of the device, and then the displacement sensor data is monitored; When used as a ladder, after the first step is completed, the counterweight platform (2) is removed, the telescopic support rod (1) is adjusted to 180 degrees, all the telescopic cross bars (22) in the counterweight platform (21) are taken out, and one or more cross bar connection holes (111) are placed at intervals to realize the ladder function; Step 5, recovery device; After use, remove the displacement sensor; Loosen the second fixing screw (322), open the fastener (321), remove the displacement sensor fixing device (3), and then tighten the second fixing screw (322) to prevent the other part of the fastener (321) from falling off; Press the horizontal plate (31) into the catch (114) on the side of the upper rod; Remove the telescopic cross bar (22) from the cross bar connection hole (111) of the upper rod (11), and put it into the telescopic cross bar storage hole (211) of the load-bearing platform (21), and fix it with a baffle (215); Finally, the ear screw (132) is loosened, the support rod (12) is retracted, and the recovery of the device is completed.

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